DataVXAdvanced MaterialsPaper
journal article·2024-11

Electrolyte Solvation Engineering Stabilizing Anode‐Free Sodium Metal Battery With 4.0 V‐Class Layered Oxide Cathode

Yeguo Zou, Baodan Zhang, Haiyan Luo, Xiaoyu Yu, Meiling Yang, Qizheng Zheng, Junhao Wang, Chenyang Jiao, Yilong Chen, Haitang Zhang, Jiyuan Xue, Xiaoxiao Kuai, Hong‐Gang Liao, Chuying Ouyang, Ziyang Ning, Yu Qiao, Shi‐Gang Sun

Advanced Materials· Volume 36· Issue 47
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Source abstract

Abstract

Abstract Anode‐free sodium metal batteries (AFSMBs) are regarded as the “ceiling” for current sodium‐based batteries. However, their practical application is hindered by the unstable electrolyte and interfacial chemistry at the high‐voltage cathode and anode‐free side, especially under extreme temperature conditions. Here, an advanced electrolyte design strategy based on electrolyte solvation engineering is presented, which shapes a weakly solvating anion‐stabilized (WSAS) electrolyte by balancing the interaction between the Na+‐solvent and Na+‐anion. The special interaction constructs rich contact ion pairs (CIPs) /aggregates (AGGs) clusters at the electrode/electrolyte interface during the dynamic solvation process which facilitates the formation of a uniform and stable interfacial layer, enabling highly stable cycling of 4.0 V‐class layered oxide cathode from −40 °C to 60 °C and excellent reversibility of Na plating/stripping with an ultrahigh average CE of 99.89%. Ultimately, industrial multi‐layer anode‐free pouch cells using the WSAS electrolyte achieve 80% capacity remaining after 50 cycles and even deliver 74.3% capacity at −30 °C. This work takes a pivotal step for the further development of high‐energy‐density Na batteries.
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Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China

Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM) Xiamen 361005 P. R. China

School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 P. R. China

Prof. C. Ouyang Dr. Z. Ning Fujian Science & Technology Innovation Laboratory for Energy Devices (21C‐Lab) Contemporary Amperex Technology Co. Limited (CATL) Ningde 352100 P. R. China

Department of Physics Laboratory of Computational Materials Physics Jiangxi Normal University Nanchang 330022 P. R. China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · China Postdoctoral Science Foundation · Ministry of Science and Technology of the People's Republic of China

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